Electronics Forum | Fri Jun 03 16:35:40 EDT 2005 | davef
We've never tried to remove Paraylene from a BGA, but we stayed [in seperate rooms] at the Red Roof Inn. Parylene/Paraxylyene is a great coating and can be selectively removed by several methods. IPC-7711 (Rework of Electronic Assemblies) has a sect
Electronics Forum | Wed Jun 08 15:50:32 EDT 2005 | davef
Microshot blasting suppliers that recognize steps must be taken to control potentail dmage from ESD are: * Comco 2151 North Lincoln Street Burbank, CA 91504-3344; 800-796-6626 818-841-5500 F818-955-8365 info@COMCOinc.com http://www.comcoinc.com * CC
Electronics Forum | Thu Sep 08 18:41:17 EDT 2005 | bhu
Try parylene. http://www.vp-scientific.com/parylene_properties.htm
Electronics Forum | Tue Sep 08 16:32:23 EDT 2015 | duso02
Commonly done with Parylene.
Electronics Forum | Mon Feb 09 15:41:38 EST 2009 | diamondmt
I would be glad to help you out in recommending a couple of coating choices,(at a very competitive price) but I believe you will have the most success with Parylene coating as long term reliability looks to be very important as well as flexiblity. Th
Electronics Forum | Wed Oct 05 04:32:49 EDT 2016 | piyakorn
Rinse IPA 5 Min --> Treathment/soak IPA50%+SILENT50% 5Min --> Baking 60C/30Min --> Parylene coating (around 8Hr in chamber) --> Found defect spot. We have simulated and ensure board drying before parylene that still have spots. Need help - Thank y
Electronics Forum | Thu Oct 06 21:46:32 EDT 2016 | piyakorn
am worrying on a hight temp that will affect to others components mounted on board or not such ICs.. Thank you davef -
Electronics Forum | Thu Oct 06 12:18:31 EDT 2016 | davef
Looks like moisture bubbling out of the board. I doubt that your baking at 60*C for a half hour is going to do very much to dewet the board. 60*C is warm to the touch, that's it!!! Water boils at 100*C. 60*C is the temperature of a cup of Dunkin. Cr
Electronics Forum | Fri Oct 07 08:48:45 EDT 2016 | davef
Two things ... A friend in the contract coating business said: "... the board is not being baked out long enough, 30 min is certainly not long enough depending on how many layers this board is, as the vacuum (from the parylene process) is pulling t
Electronics Forum | Fri Oct 18 12:40:35 EDT 2013 | robertwillis
Back in the mists of time there were two papers on the use of Parylene Coating and the improved thermal cycling results in 1990. It was on LCCC then shortly after on BGA. Does anyone know of results of recent trials or have a copy of the BGA papers.
